#include <stdio.h>

struct CCalc
{

    void input(void)
    {
        printf("Input two int number :");
        scanf("%d%d", &a, &b);
    }
    void add()
     {
       c =  a + b;
     }
     void output(void)
     {
         printf("%d + %d = %d \n",a,b,c);
     }

  int a;
  int b;
  int c;
};
int main()
{

    CCalc calc;

    calc.input();
    calc.add();
    calc.output();

    return 0;
}
